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package com.velocityme.entity;

import java.io.Serializable;
import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.GenerationType;
import javax.persistence.Id;
import javax.persistence.ManyToOne;
import javax.persistence.NamedQueries;
import javax.persistence.NamedQuery;

/**
 *
 * @author rcrida
 */
@Entity
@NamedQueries({
    @NamedQuery(name="findLinkedNodes",
                query="SELECT n FROM NodeLink l, Node n WHERE (l.toNode = :node AND n = l.fromNode) OR (l.fromNode = :node AND n = l.toNode)"),
    @NamedQuery(name="findNodeLink",
                query="SELECT l FROM NodeLink l WHERE (l.toNode = :node AND l.fromNode = :otherNode) OR (l.toNode = :otherNode AND l.fromNode = :node)")
})
public class NodeLink implements Serializable {
    private static final long serialVersionUID = 1L;
    @Id
    @GeneratedValue(strategy = GenerationType.AUTO)
    private Long id;

    @ManyToOne
    private Node toNode;

    @ManyToOne
    private Node fromNode;

    protected NodeLink() {
    }

    public NodeLink(Node toNode, Node fromNode) {
        this.toNode = toNode;
        this.fromNode = fromNode;
    }

    public Long getId() {
        return id;
    }

    public void setId(Long id) {
        this.id = id;
    }

    public Node getToNode() {
        return toNode;
    }

    public void setToNode(Node toNode) {
        this.toNode = toNode;
    }

    public Node getFromNode() {
        return fromNode;
    }

    public void setFromNode(Node fromNode) {
        this.fromNode = fromNode;
    }

    @Override
    public int hashCode() {
        int hash = 0;
        hash += (id != null ? id.hashCode() : 0);
        return hash;
    }

    @Override
    public boolean equals(Object object) {
        // TODO: Warning - this method won't work in the case the id fields are not set
        if (!(object instanceof NodeLink)) {
            return false;
        }
        NodeLink other = (NodeLink) object;
        if ((this.id == null && other.id != null) || (this.id != null && !this.id.equals(other.id))) {
            return false;
        }
        return true;
    }

    @Override
    public String toString() {
        return "com.velocityme.entity.NodeLink[id=" + id + "]";
    }

}
